The 1958 movie, Ramadal, a popular serialized novel by Jose D. Karasig and Nemesio E. Caravana, tells of a young man named Carlito (Efren Reyes), who in a fit of jealousy, injects himself with a mysterious drug that makes him invisible. Such movie plot and story that time poses a challenge to the ingenuity of a director, producer or the production staff, It is very in its to produce, yet it is too good to let go. The problem lies on how to film the story in its entirety, which calls for a complicated camera tricks - with the hero emphatically present yet invisible. The movie starts with Dr. Rafael Martinez Dalte (Jose Garcia), Carlito's father, discovering a rare kind of tree sap during one of his hunting trips in the jungle. The doctor first saw the potency of the sap manifested in one of the birds he took home whose wings he could feel with his fingers but could not see.